Alt-BEAM Archive

Message #10917



To: beam@sgiblab.sgi.com
From: BUDSCOTT@aol.com
Date: Sat, 26 Feb 2000 16:59:35 EST
Subject: [alt-beam] mini walker


i'm still tinkering with my other walker, (which still has screwed up
timing), and am thinking about my second one. where as some say think big,
i'm gonna think small. would it be possible to make a walker with two
extremely small tape play motors that wouldn't need a motor driver and a
freeformed bicore. I want to avoid the inconvinience of having to use gear
motors. if i slowed down the timing, and made it extremely light, would this
work? Thanks for the help!

-Spencer



10918 Sat, 26 Feb 2000 14:15:36 -0800 (PST) [alt-beam] master-slave bicore beam@sgiblab.sgi.com "Travis D." I just hooked up my master/slave bicore circuit this
morning, but I have a question. Is the slave bicore
supposed to follow the master or is it supposed to be
the opposite of the master (all I'd have to do is
switch the motor leads to change it to follow it, but
I'm not sure how it is supposed to be in order to hook
it to a 2 motor walker--has anyone every tried hooking
them up opposite one another?).

Please respond to me personally,
Thanks,

Travis
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10919 Sat, 26 Feb 2000 14:16:53 -0800 (PST) [alt-beam] Re: mini walker beam@sgiblab.sgi.com "Travis D." try building the frame and breadboarding the circuit
to see if it would work....that's what I did for my
current walker...

--- BUDSCOTT@aol.com wrote:
> i'm still tinkering with my other walker, (which
> still has screwed up
> timing), and am thinking about my second one. where
> as some say think big,
> i'm gonna think small. would it be possible to make
> a walker with two
> extremely small tape play motors that wouldn't need
> a motor driver and a
> freeformed bicore. I want to avoid the inconvinience
> of having to use gear
> motors. if i slowed down the timing, and made it
> extremely light, would this
> work? Thanks for the help!
>
> -Spencer
>
__________________________________________________
Do You Yahoo!?
Talk to your friends online with Yahoo! Messenger.
http://im.yahoo.com



10920 Sat, 26 Feb 2000 17:55:51 -0800 [alt-beam] Re: mini walker "Dennison Bertram"


> i'm still tinkering with my other walker, (which still has screwed up
> timing), and am thinking about my second one. where as some say think big,
> i'm gonna think small.

good idea.

would it be possible to make a walker with two
> extremely small tape play motors that wouldn't need a motor driver and a
> freeformed bicore.

Yes, but it's not what you think.

I want to avoid the inconvinience of having to use gear
> motors.

You need gear motors. If you look at the lego motors, they are much smaller
than your tape player motors.

if i slowed down the timing, and made it extremely light, would this
> work?

Nope.


Ok here's the low down. I once made a gearless walker using small but
powerfull motors. The trick to all of this is that you need a really fast,
(blazing fast) controller and yes it must be extremely light. but in
addition, you need tons of power going through the motors to get enough
torque. I needed several amps. I ended up starting a small fire because a
wire of mine crossed, and I had so much power that the metal fused and then
shorted into a big mess. The walker did however, "walk" and darm fast.
Although it has many of the qualities of 'jumping'. as it more or less
'bounces' like crazy. To be frank however, you can't really do it without
gearboxes if you trully want to make a tiny walker try something like the
lego motors. If you look at the pictuers of my bicore walker at Yahoo,
(under BEAM club and under photo album and under dennison's bots.) Or on
heretics, http://www.serve.com/~heretics
something like that anyway. There I made a tiny walker only about two or
three inches long.
You main problem will always be your power supply though.

dennison

Thanks for the help!
>
> -Spencer
>

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